#!/bin/bash

#=================================================
# GENERIC STARTING
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# RETRIEVE ARGUMENTS
#=================================================

old_domain=$YNH_APP_OLD_DOMAIN
old_path=$YNH_APP_OLD_PATH

new_domain=$YNH_APP_NEW_DOMAIN
new_path=$YNH_APP_NEW_PATH

app=$YNH_APP_INSTANCE_NAME

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..."

# Needed for helper "ynh_add_nginx_config"
final_path=$(ynh_app_setting_get --app=$app --key=final_path)

# Add settings here as needed by your application
port=$(ynh_app_setting_get --app=$app --key=port)
is_public=$(ynh_app_setting_get --app=$app --key=is_public)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
db_user=$db_name
secret=$(ynh_app_setting_get --app=$app --key=secret)
max_file_size=$(ynh_app_setting_get --app=$app --key=max_file_size)

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before changing its URL (may take a while)..."

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# Remove the new domain config file, the remove script won't do it as it doesn't know yet its location.
	ynh_secure_remove --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"

	# restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# CHECK WHICH PARTS SHOULD BE CHANGED
#=================================================

change_domain=0
if [ "$old_domain" != "$new_domain" ]
then
	change_domain=1
fi

change_path=0
if [ "$old_path" != "$new_path" ]
then
	change_path=1
fi

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..."

ynh_systemd_action --service_name=$app --action="stop" --log_path="$final_path/log/production.log"

#=================================================
# MODIFY URL IN NGINX CONF
#=================================================
ynh_script_progression --message="Updating NGINX web server configuration..."

nginx_conf_path=/etc/nginx/conf.d/$old_domain.d/$app.conf

# Change the path in the NGINX config file
if [ $change_path -eq 1 ]
then
	# Make a backup of the original NGINX config file if modified
	ynh_backup_if_checksum_is_different --file="$nginx_conf_path"
	# Set global variables for NGINX helper
	domain="$old_domain"
	path_url="$new_path"
	# Create a dedicated NGINX config
	ynh_add_nginx_config max_file_size
fi

# Change the domain for NGINX
if [ $change_domain -eq 1 ]
then
	# Delete file checksum for the old conf file location
	ynh_delete_file_checksum --file="$nginx_conf_path"
	mv $nginx_conf_path /etc/nginx/conf.d/$new_domain.d/$app.conf
	# Store file checksum for the new config file location
	ynh_store_file_checksum --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"
fi

#=================================================
# SPECIFIC MODIFICATIONS
#=================================================
# CONFIGURE LUFI
#=================================================
ynh_script_progression --message="Configuring lufi..."

domain="$new_domain"
path_url="$new_path"

config=${final_path}/lufi.conf
ynh_backup_if_checksum_is_different --file="$config"
cp ../conf/lufi.conf.template "$config"
ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="$config"
ynh_replace_string --match_string="__PATH__" --replace_string="$path_url" --target_file="$config"
ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$config"
ynh_replace_string --match_string="__DB_NAME__" --replace_string="$db_name" --target_file="$config"
ynh_replace_string --match_string="__DB_USER__" --replace_string="$db_user" --target_file="$config"
ynh_replace_string --match_string="__DB_PWD__" --replace_string="$db_pwd" --target_file="$config"
ynh_replace_string --match_string="__MAX_FILE_SIZE__" --replace_string="$max_file_size" --target_file="$config"
if [ $max_file_size -eq 0 ]; then # Comment the limitation line if no limit
	ynh_replace_string --match_string="max_file_size" --replace_string="#max_file_size" --target_file="$config"
fi
ynh_replace_string --match_string="__SECRET__" --replace_string="$secret" --target_file="$config"
if [ $is_public -eq 0 ];
then
	ynh_replace_string --match_string="__IS_PUBLIC__" --replace_string="" --target_file="$config"
else
	ynh_replace_string --match_string="__IS_PUBLIC__" --replace_string="#" --target_file="$config"
fi
ynh_store_file_checksum --file="$config"

chmod 600 $final_path/lufi.conf
chown $app:$app $final_path/lufi.conf

#=================================================
# UPDATE SSOWAT
#=================================================
ynh_script_progression --message="Reconfiguring permissions..."

ynh_permission_update --permission="main" --add="visitors"

if [ $is_public -eq 0 ]
then
	if [ "$path_url" == "/" ]; then
	    # If the path is /, clear it to prevent any error with the regex.
	    path_url=""
	fi
	# Modify the domain to be used in a regex
	domain_regex=$(echo "$domain" | sed 's@-@.@g')
	ynh_app_setting_set --app=$app --key=protected_regex --value="$domain_regex$path_url/stats$","$domain_regex$path_url/manifest.webapp$","$domain_regex$path_url/$","$domain_regex$path_url/d/.*$","$domain_regex$path_url/m/.*$"
fi

#=================================================
# GENERIC FINALISATION
#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..."

ynh_systemd_action --service_name=$app --action="start" --log_path="$final_path/log/production.log" --line_match="Creating process id file"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..."

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# END OF SCRIPT
#=================================================

ynh_script_progression --message="Change of URL completed for $app"